Measuring sensor for fluid state determination and method for measurement using such sensor
CA 2011659 C · Owner: Saiki, Yukihiro · Inventors: Aoki, Kazuichi; Saiki, Yukihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A measuring sensor comprising a heating element and a temperature detecting element used to measure a temperature of the heating element are both held out of contact with each other (preferably by an electrically insulative but thermally good conductive material) within a protective tube. For fluid exhibiting slow changes in its state with passage of time the fluid, state is measured utilizing said sensor on the basis of a differential between temperatures prior to and during heating of the heating element. For fluid exhibiting rapid changes in its state with passage of time the measuring, sensor and a separate temperature detecting sensor are used to measure a temperature of the fluid. The …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 7, 1990 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.